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core/storagemanager.lua @ 7632:2b14e2121700
configure: Add ostype preset for NetBSD
author | Holger Weiss <holger@zedat.fu-berlin.de> |
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date | Fri, 17 Apr 2015 12:03:15 +0200 |
parent | 7325:7baf1b14defb |
child | 7327:d62f0471470f |
child | 7643:44fe2aaf817e |
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local type, pairs = type, pairs; local setmetatable = setmetatable; local config = require "core.configmanager"; local datamanager = require "util.datamanager"; local modulemanager = require "core.modulemanager"; local multitable = require "util.multitable"; local hosts = hosts; local log = require "util.logger".init("storagemanager"); local prosody = prosody; local _ENV = nil; local olddm = {}; -- maintain old datamanager, for backwards compatibility for k,v in pairs(datamanager) do olddm[k] = v; end local null_storage_method = function () return false, "no data storage active"; end local null_storage_driver = setmetatable( { name = "null", open = function (self) return self; end }, { __index = function (self, method) --luacheck: ignore 212 return null_storage_method; end } ); local stores_available = multitable.new(); local function initialize_host(host) local host_session = hosts[host]; host_session.events.add_handler("item-added/storage-provider", function (event) local item = event.item; stores_available:set(host, item.name, item); end); host_session.events.add_handler("item-removed/storage-provider", function (event) local item = event.item; stores_available:set(host, item.name, nil); end); end prosody.events.add_handler("host-activated", initialize_host, 101); local function load_driver(host, driver_name) if driver_name == "null" then return null_storage_driver; end local driver = stores_available:get(host, driver_name); if driver then return driver; end local ok, err = modulemanager.load(host, "storage_"..driver_name); if not ok then log("error", "Failed to load storage driver plugin %s on %s: %s", driver_name, host, err); end return stores_available:get(host, driver_name); end local function get_storage_config(host) -- COMPAT w/ unreleased Prosody 0.10 and the once-experimental mod_storage_sql2 in peoples' config files local storage_config = config.get(host, "storage"); local found_sql2; if storage_config == "sql2" then storage_config, found_sql2 = "sql", true; elseif type(storage_config) == "table" then for store_name, driver_name in pairs(storage_config) do if driver_name == "sql2" then storage_config[store_name] = "sql"; found_sql2 = true; end end end if found_sql2 then log("error", "The temporary 'sql2' storage module has now been renamed to 'sql', please update your config file: https://prosody.im/doc/modules/mod_storage_sql2"); end return storage_config; end local function get_driver(host, store) local storage = get_storage_config(host); local driver_name; local option_type = type(storage); if option_type == "string" then driver_name = storage; elseif option_type == "table" then driver_name = storage[store]; end if not driver_name then driver_name = config.get(host, "default_storage") or "internal"; end local driver = load_driver(host, driver_name); if not driver then log("warn", "Falling back to null driver for %s storage on %s", store, host); driver_name = "null"; driver = null_storage_driver; end return driver, driver_name; end local map_shim_mt = { __index = { get = function(self, username, key) local ret, err = self.keyval_store:get(username); if ret == nil then return nil, err end return ret[key]; end; set = function(self, username, key, data) local current, err = self.keyval_store:get(username); if current == nil then if err then return nil, err; else current = {}; end end current[key] = data; return self.keyval_store:set(username, current); end; set_keys = function (self, username, keydatas) local current, err = self.keyval_store:get(username); if current == nil then if err then return nil, err; end current = {}; end for k,v in pairs(keydatas) do if v == self.remove then v = nil; end current[k] = v; end return self.keyval_store:set(username, current); end; remove = {}; }; } local open; local function create_map_shim(host, store) local keyval_store, err = open(host, store, "keyval"); if keyval_store == nil then return nil, err end return setmetatable({ keyval_store = keyval_store; }, map_shim_mt); end function open(host, store, typ) local driver, driver_name = get_driver(host, store); local ret, err = driver:open(store, typ); if not ret then if err == "unsupported-store" then if typ == "map" then -- Use shim on top of keyval store log("debug", "map storage driver unavailable, using shim on top of keyval store."); return create_map_shim(host, store); end log("debug", "Storage driver %s does not support store %s (%s), falling back to null driver", driver_name, store, typ or "<nil>"); ret = null_storage_driver; err = nil; end end return ret, err; end local function purge(user, host) local storage = get_storage_config(host); if type(storage) == "table" then -- multiple storage backends in use that we need to purge local purged = {}; for store, driver_name in pairs(storage) do if not purged[driver_name] then local driver = get_driver(host, store); if driver.purge then purged[driver_name] = driver:purge(user); else log("warn", "Storage driver %s does not support removing all user data, you may need to delete it manually", driver_name); end end end end get_driver(host):purge(user); -- and the default driver olddm.purge(user, host); -- COMPAT list stores, like offline messages end up in the old datamanager return true; end function datamanager.load(username, host, datastore) return open(host, datastore):get(username); end function datamanager.store(username, host, datastore, data) return open(host, datastore):set(username, data); end function datamanager.users(host, datastore, typ) local driver = open(host, datastore, typ); if not driver.users then return function() log("warn", "Storage driver %s does not support listing users", driver.name) end end return driver:users(); end function datamanager.stores(username, host, typ) return get_driver(host):stores(username, typ); end function datamanager.purge(username, host) return purge(username, host); end return { initialize_host = initialize_host; load_driver = load_driver; get_driver = get_driver; open = open; purge = purge; olddm = olddm; };